Abstract: The present invention utilizes a centralizer having a plurality of segmented stress risers. The segmented stress risers are designed to allow sufficient strength to maintain the tubing in a centralized downhole location, while to allow for the stress relief grooves to be sheared off when a wash pipe or similar device is utilized to clean out any unwanted build up of material or deposits in the borehole. Once the segments have been sheared off they can be circulated out of borehole.
Type:
Grant
Filed:
January 29, 1992
Date of Patent:
January 3, 1995
Assignee:
Rickert Precision Industries
Inventors:
Robert J. Uherek, Brian Uherek, George A. Moran
Abstract: A blast joint comprising a series of standard length joints of production tubing is disclosed. The blast joint includes a series of cylindrical rings composed of an abrasion resistant material mounted about the tubular tubing joints forming a protective shield about the production tubing. A movable sleeve formed of cylindrical abrasion resistant rings is selectively shiftable to enclose and shield the tubing connection assemblies joining the production tubing forming the blast joint. The production tubing and abrasion resistant rings form a blast joint whose length exceeds the standard length of a single joint of production tubing.
Abstract: A blast joint comprising a series of standard length joints of production tubing is disclosed. The blast joint includes a series of cylindrical rings composed of an abrasion resistant material mounted about the tubular tubing joints forming a protective shield about the production tubing. A movable sleeve formed of cylindrical abrasion resistant rings is selectively shiftable to enclose and shield the tubing connection assemblies joining the production tubing forming the blast joint. The production tubing and abrasion resistant rings form a blast joint whose length exceeds the standard length of a single joint of production tubing.